April 29, 2004

Structural Design of Polypropylene Chambers Using Plastic Pipe Analysis, Design, and Test Methods

By: Jesse Beaver, McGrath, Timothy J., Phillip Sharff

Abstract: Plastic pipe has been used for many years in applications to control surface water runoff by detention, retention, and infiltration. Review of deficiencies with available pipe geometries resulted in creation of a new product,...

Services:Materials Design, Structural Design
Markets:Water/Wastewater
Keywords:Civil, Civil: On-Site Stormwater Management, Culverts and Storm Drains, Field Testing, Plastic/Composite, Soil-Structure Interaction, Tank
April 1, 2004

Office Fit-Out and Floor Vibrations

By: Christopher Hewitt, Thomas M. Murray

Gone are the days of offices with tall partitions, heavy file cabinets, and large, filled bookshelves, and with them has gone the inherent redundancy of office buildings against floor vibration. Although sometimes mistakenly associated with the...

Services:Structural Design
Keywords:Dynamic/Vibration, Metal-Steel
March 30, 2004

Design of steel structures for blast-related progressive collapse resistance

By: Ronald Hamburger, Whittaker, Andrew

Abstract: Structural design of steel structures in buildings to resist the effects of potential blasts is discussed. Steel building systems are found to be ideal due to the toughness of structural steel as a material and the relative ease of...

Services:Materials Design, Structural Design
Keywords:Blast Analysis & Resistance, Metal, Metal-Steel
March 30, 2004

Effects of Reference Displacement and Damage Accumulation in Wood Shear Walls

By: Jeffrey Langlois, Gupta R., Miller T.

Abstract: The objectives of this study were: (1) to evaluate the effect of reference displacement on wall behavior under fully reversed cyclic loading using the Consortium of Universities for Research in Earthquake Engineering (CUREE) test...

Services:Structural Investigation
Keywords:Analytical Studies, Failure Investigation, Laboratory Testing and Analysis, Seismic Analyses, Walls, Wood
January 30, 2004

Thrust Restraint Design of Concrete Pressure Pipe

By: Mehdi Zarghamee, Daniel Eggers, Rasko Ojdrovic, Daniel Valentine

Abstract: A finite-element model of a buried pipeline consisting of concrete pressure pipe segments and joints is developed for analysis of longitudinal effects resulting from pressure-induced thrust at a bend. The model accounts for longitudinal...

Services:Structural Design
Markets:Water/Wastewater
Keywords:Concrete, Finite Element Analysis, Pipeline, Soil-Structure Interaction
January 30, 2004

Rising to the Challenge: Roofing Rehabilitation of the New York State Capitol

By: Niklas Vigener, James Jamieson

Abstract: Consider a list of single conditions that can make any roofing project significantly more challenging:|- Complex roof geometries and conditions|- A plethora of different roofing materials|- Extremely steep roof slopes|- Difficult access...

Services:Building Enclosure Rehabilitation
Markets:Government
Keywords:Historic, Masonry-Terra Cotta, Preservation Technology , Roof Replacement, Roofing, Water Leakage
January 28, 2004

Rationale Behind and Proper Application of the Ductility Factor for Bracing Connections Subjected to Shear and Transverse Loading

By: Christopher Hewitt, William A. Thornton

In 1990, AISC and ASCE jointly commissioned a task group to develop a design philosophy for predicting the strength of bracing connections. The design methods in place prior to that time were only applicable to connections made to the webs of...

Services:Structural Design
Keywords:Braced Frame, Metal-Steel, Truss
December 31, 2003

Analysis and performance of PCCP Mortar Coating

By: Mauro Scali, Paul Scheiner, Rasko Ojdrovic, Mehdi Zarghamee, Aquino W.

Abstract: The evaluation of cement mortar coatings on prestressed concrete cylinder pipes (PCCP) may include such techniques as petrographic examination, material testing, and environmental testing of soil and groundwater. Petrographic analysis...

Services:Materials Investigation
Markets:Water/Wastewater
Keywords:Concrete, Corrosion, Laboratory Testing and Analysis, Materials Analysis, Petrography, Pipeline
June 1, 2001

Under the Microscope

By: Paul Kelley, Glenn Bell, Michael Brainerd, Mauro Scali

Abstract: Forensic engineering is typically more complex than engineering design because it requires the integration of specialized knowledge of materials science, structural analysis and design, and construction...

Services:Materials Investigation, Structural Investigation
Keywords:Concrete, Laboratory Testing and Analysis, Masonry, Materials Analysis, Petrography
December 13, 1998

Specifying Air Entrainment

By: Michael Brainerd, Mauro Scali, Paul Kelley

Abstract: Air entrainment can prevent cyclic freeze-thaw damage to concrete over a reasonable service life if coupled with a strong cement paste with low permeability. This article discusses how to correctly specify air entrainment, including...

Services:Structural Rehabilitation
Keywords:Concrete, Freeze-Thaw, Petrography

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